Save `eslint` dependencies and create npm script `lint`
Save `eslint` dependencies and create npm script `lint`

Save devDependencies:
* eslint@3.12.2
* babel-eslint@7.1.1
* eslint-plugin-react@6.8.0

Create `lint` script that uses `.gitignore` as ignore path and
lints files with the extensions `.js` and `.jsx`.

remarkablemark/react-engine-template,remarkablemark/react-engine-template